Ma Dong, Shen Min, Luo Yi-wen, Bo Jun, Xu Che, Zhuo Xian-yi
Forensic Medicine Department of Shanghai Medical College, Fudan University, Shanghai 200032, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2010 Oct;30(10):2816-9.
To establish an identification method for the forensic analysis of blue ballpoint ink by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), 95 kinds of blue ballpoint pen from different manufacturers were detected. These blue ballpoint pens were classified into 34 groups according to their metal element components, among which, 26 groups can be directly distinguished according to the types of metal element components contained in the ballpoint pen, the other groups can be distinguished by different element response ratios. Meanwhile the examination result on the papers showed that the papers have no impact on the ink handwriting analysis. Experimental results showed that the method's reproducibility is good and precision is less than 10%. This method has better identification ability than traditional identification technology for questioned document. Eighty eight kinds of blue ballpoint pen out of the total 95 selected kinds can be distinguished with this method. The established method is simple, rapid, with good precision, and almost has no damage to the sample. It is particularly suitable for the demand of identification of blue ballpoint pen in forensic science.
为建立一种利用激光烧蚀电感耦合等离子体质谱法（LA-ICP-MS）对蓝色圆珠笔油墨进行法医分析的鉴定方法，检测了95种不同厂家生产的蓝色圆珠笔。这些蓝色圆珠笔根据其金属元素成分被分为34组，其中26组可根据圆珠笔所含金属元素成分的类型直接区分，其他组可通过不同的元素响应比来区分。同时对纸张的检测结果表明，纸张对油墨笔迹分析没有影响。实验结果表明，该方法的重现性良好，精密度小于10%。该方法比传统的可疑文件鉴定技术具有更好的鉴定能力。所选的95种蓝色圆珠笔中，有88种可以用该方法区分。所建立的方法简单、快速，精密度好，对样品几乎无损伤。特别适用于法医学中蓝色圆珠笔的鉴定需求。
